403420040 has 32 divisors (see below), whose sum is σ = 912726360. Its totient is φ = 160473600.

The previous prime is 403420037. The next prime is 403420051. The reversal of 403420040 is 40024304.

It can be written as a sum of positive squares in 4 ways, for example, as 332624644 + 70795396 = 18238^2 + 8414^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20621 + ... + 35100.

Almost surely, 2^403420040 is an apocalyptic number.

403420040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

403420040 is an abundant number, since it is smaller than the sum of its proper divisors (509306320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

403420040 is a wasteful number, since it uses less digits than its factorization.

403420040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55913 (or 55909 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 403420040 is about 20085.3190166350. The cubic root of 403420040 is about 738.9002656607.

Adding to 403420040 its reverse (40024304), we get a palindrome (443444344).

The spelling of 403420040 in words is "four hundred three million, four hundred twenty thousand, forty".